Upon contraction, the smallest motor unit, that is, the one associated with the fewest muscle fibers, is the normally the first activated. As the contraction progresses, larger motor units are brought into play.Efficient muscle contraction depends on the motor units within a muscle working effectively together.pon contraction, the smallest motor unit, that is, the one associated with the fewest muscle fibers, is the normally the first activated. As the contraction progresses, larger motor units are brought into play.
Trojan programs are most dangerous because they can create a back door. into your computer that gives malicious hackers direct access to your. system. Once installed, Trojans can hijack your PC and upload usernames, passwords, credit card numbers, social security numbers, and bank account.
That means all the computers infected with Code Red tried to contact the Web servers at the White House at the same time, overloading the machines. A Windows 2000 machine infected by the Code Red II worm no longer obeys the owner.That's because the worm creates a backdoor into the computer's operating system, allowing a remote user to access and control the machine. In computing terms, this is a system-level compromise, and it's bad news for the computer's owner.hat means all the computers infected with Code Red tried to contact the Web servers at the White House at the same time, overloading the machines. A Windows 2000 machine infected by the Code Red II worm no longer obeys the owner.